Heat and Mass Transfer The unit of overall coefficient of heat transfer is kcal/m² kcal/m² hr °C kcal/m hr °C kcal/hr °C kcal/m² kcal/m² hr °C kcal/m hr °C kcal/hr °C ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer Reynolds number (RN) is given by (where h = Film coefficient, l = Linear dimension, V = Velocity of fluid, k = Thermal conductivity, t = Temperature, ρ = Density of fluid, cp = Specific heat at constant pressure, and μ = Coefficient of absolute viscosity) RN = ρ V l /μ RN = V²/t.cp RN = hl/k RN = μ cp/k RN = ρ V l /μ RN = V²/t.cp RN = hl/k RN = μ cp/k ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer According to Newton's law of cooling, the heat transfer from a hot body to a cold body is Both (A) and (B) Directly proportional to the difference of temperatures between the two bodies Directly proportional to the surface area Either (A) or (B) Both (A) and (B) Directly proportional to the difference of temperatures between the two bodies Directly proportional to the surface area Either (A) or (B) ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer Film coefficient is defined as Inside diameter of tube Film coefficient × Inside diameter Thermal conductivity Equivalent thickness of film Thermal conductivity Equivalent thickness of film Specific heat × Viscosity Thermal conductivity Molecular diffusivity of momentum Thermal diffusivity Film coefficient × Inside diameter Thermal conductivity Equivalent thickness of film Thermal conductivity Equivalent thickness of film Specific heat × Viscosity Thermal conductivity Molecular diffusivity of momentum Thermal diffusivity ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer The critical temperature is the temperature Above which a gas will never liquefied Below which a gas is always liquefied Below which a gas does not obey gas laws Above which a gas may explode Above which a gas will never liquefied Below which a gas is always liquefied Below which a gas does not obey gas laws Above which a gas may explode ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer Which of the following is a case of steady state heat transfer? I.C. engine Air preheaters None of these Heating of building in winter I.C. engine Air preheaters None of these Heating of building in winter ANSWER DOWNLOAD EXAMIANS APP
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